<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <style>
        .fa{
            border: 5px solid black;
            background-color: #cccccc;

            display: flex;
        }
        .c1{
            background-color: red;
            color: white;

            width: 50%;
        }
        .c2{
            background-color: blue;
            color: white;
            width: 50%;
        }
    </style>
    <div class="fa">
        <div class="c1">马超</div>
        <div class="c2">张飞</div>
    </div>
    <h1>左200px，右侧剩下的充满</h1>
    <div style="border: 5px solid black;display: flex;">
        <div style="
            background-color: pink;
            width: 200px;
            flex-shrink: 0;
            ">left马超马超马超马超马超</div>
        <div style="
                background-color: aquamarine;
                flex-grow: 1;
            ">right</div>
    </div>
    <hr>
    <style>
        .x3{
            background-color: pink;
            display: flex;
        }
    </style>
    <div class="x3">
        <span>111</span>
        <span style="margin-right: auto;">222</span>
        <span>333</span>
    </div>
    <hr>
    <div class="x3">
        <span>111</span>
        <span>222</span>
        <span style="margin-left: auto;">333</span>
    </div>
</body>
</html>